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Bussmann FWH-125B - Semiconductor High-Speed 125A Fuse (500V)

United Fuses
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Bussmann FWH-125B is a semiconductor high-speed fuse designed for fast-acting overcurrent protection of power electronic circuits. This 125 Amp, 500 Volt AC/DC fuse provides a 200 kA interrupting rating at 500 VAC and 50 kA at 500 VDC, ensuring robust fault clearance in demanding applications. The fuse features a cartridge blade body style with stud mounting and a physical size of approximately 1 inch by 3.625 inches, weighing 5.19 lb. It is UL and CSA certified for reliable performance in industrial environments. Typical applications include semiconductor protection and DC drive systems requiring precise, high-speed current limitation.

Key Features & Specifications
  • Amperage: 125 A
  • Voltage Rating: 500 VAC / 500 VDC
  • Fuse Type: Semiconductor High Speed
  • Mounting Type: Stud Mount
  • Interrupting Rating: 200 kA @ 500 VAC, 50 kA @ 500 VDC
  • Body Style: Cartridge Blade
  • Trip Indicator: None
  • Certifications: UL, CSA
  • Physical Size: Approx. 1" x 3.625"
  • Series: FWH
  • Weight: 5.19 lb